Cool, I've never seen any of these up close. It's not a spring reverb as I've understood it. I expect it's based on BBDs but I'm not sure about the design of these units.
Like the rest of us, I would be really keen to see some internal pics, including the internal shots of the Z-fold spring pan.
I have a few Z-fold pans made back in the 70's-early 80's by a much respected Californian company.
I also have a 5 page Spring Reverb project, from a magazine called ETI (electronics Today International) (1976-77). that uses those springs pans, or similar. I bet Laurie remembers that old & now defunct magazine from his youth.
It would be interesting to know if these are the ones that are used in the RX-100.
Regards Dr. Bob Collector of Technical & Musical Antiquities.
oh and it's a really bad piece of gear.. I hate it... bah.... and again for google the BOSS RX-100 or Roland RV-100 are extremly bad sounding units... not good at all.
now don't buy any so that prices drop and I can buy some more.